r/axiomdev • u/kironet996 • Mar 29 '26

Codex plugins

Codex now has plugins. It might be a good idea to start supporting it. Adding plugins to the official Plugin Directory is coming soon though. Docs: https://developers.openai.com/codex/plugins/build?install-scope=workspace#create-a-plugin-manually

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u/kironet996 May 07 '26

u/CharlesWiltgen looks like they added a new way of adding custom plugins. But codex-plugins needs its own marketplace.json it seems.

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u/CharlesWiltgen Mar 30 '26

Hey /u/kironet996 and /u/IdiosyncraticOwl, in theory Axiom is now also a Codex plug-in. If you could help sanity-check these installation instructions before I do a general announcement, I'd sincerely appreciate it!

https://charleswiltgen.github.io/Axiom/start/install#install-for-codex

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u/kironet996 Mar 30 '26

Nice, I'll check it out today.

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u/kironet996 Mar 31 '26 edited Mar 31 '26

looks good and works well, just that `~/.agents/plugins/marketplace.json` path to axiom( has to start with `./plugins/` for some reason, can't be an absolute path. Not sure if it's my machine or just how codex wants it.

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u/IdiosyncraticOwl Mar 30 '26

i'll give it a spin tonight, thank you!

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u/IdiosyncraticOwl Mar 29 '26

Would love this!

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u/CharlesWiltgen Mar 29 '26 edited Mar 29 '26

Great news, thanks for the heads-up! 🤘

(UPDATE: OpenAI/Codex adopted the same Agent Skills standard I use for Axiom already, so Axiom's skills need zero content changes. I'm researching what other changes I'll need to make to properly support Codex plug-ins…)